Table 1.

System characteristics of the WT-PET and the Quadra-like TB-PET

System parameters	WT-PET	Quadra-like TB-PET
Scintillator material	BGO	LSO
Crystal size (mm)	$50\times 50\times 16$	$3.2\times 3.2\times 20$
DOI capable	Yes	No
Ring diameter (cm)	–	82
Panels distance (cm)	50	–
Axial FOV (cm)	106	106
Shortest LOR through the center (cm)	50	82
Longest LOR through the center (cm)	138.61	134.00
Energy resolution	15 %	11 %
Energy window (keV)	434-645	455-645
TOF resolution (ps)	327	228
Dead time (ns)	370	320